2007 :
Boring Raws with almost only Cena, Orton and HHH in the main event
SmackDown not as good as the previous years, with Kennedy losing the MitB briefcase and Khali as World Champion.
ECW’s legacy definitly being destroyed (despite a good end with Nitro/Morrison and Punk).
TNA becoming Total Nonstop Angle, with underexposure of the X Division
And I wasn’t that much into ROH that year, between 2006 and 2008 that were really great.

I’ll go with 2007 because of Chris Benoit. After that, wrestling was under such scrutiny from everyone. You had the infamous “Dead Before 65″ list that was used to villify the entire industry and show that wrestlers are nothing but drug addicts. Meanwhile, no one was actually looking at the list to see people who died from causes not drug related. The media on the subject was populated with people who wanted to help/bitter ex-wrestlers and people trying to offer another side/people just wanting to stay in Vince McMahon’s good graces, depending on what side you were on. Saying you were a wrestling fan wasn’t exactly easy.